The MLBPA has restricted major leaguers David Ortiz, Robinson Cano and Miguel Cabrera from participating in the 2016 Caribbean Series’ Home Run Derby on Wednesday, reports ESPN’s Jorge Morejon.

The union’s reasoning for forbidding the star players from participating in the event is due to the fear that they will sustain injuries.

“Unfortunately, the people in charge of the event didn’t follow the necessary protocol to ensure that any major leaguers participating in an event like that one is protected from a possible injury,” MLBPA executive director Tony Clark said.

The inaugural event, which is still scheduled for Wednesday, will now take place with different players.